Light penetration in human skin: in-vivo measurements using isotropic detector

1993 ◽  
Author(s):  
Ivan S. Melnik ◽  
Rudolf W. Steiner ◽  
Alwin Kienle
Keyword(s):  
Human Skin ◽  
Light Penetration ◽  
In Vivo Measurements

scholarly journals Critical Factors for In Vivo Measurements of Human Skin by Terahertz Attenuated Total Reflection Spectroscopy

Sensors ◽  
2020 ◽  
Vol 20 (15) ◽  
pp. 4256
Author(s):  
Lixia Wang ◽  
Sayon Guilavogui ◽  
Henghui Yin ◽  
Yiping Wu ◽  
Xiaofei Zang ◽  
...  
Keyword(s):  
Human Skin ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Deep Penetration ◽  
Reference Spectrum ◽  
Critical Factors ◽  
Contact Duration ◽  
In Vivo Measurements ◽  
Different Types

Attenuated total reflection (ATR) geometry is a suitable choice for in vivo measurements of human skin due to the deep penetration of the field into the sample and since it makes it easy to measure the reference spectrum. On the other hand, there are several critical factors that may affect the terahertz (THz) response in these kinds of experiments. Here, we analyse in detail the influence of the following factors: the contact positions between the thumb and the prism, the contact pressure, the contact duration, and the materials of the prism. Furthermore, we use the THz-ATR technology to evaluate different types of handcream and also establish the theoretical model to investigate the reflectivity after interacting with the skin. The results agree well with experimental ones. Our analysis makes it clear the importance of controlling the above factors during measurements to enable reliable THz response and results which, in turn, may be used to monitor water motion in human skin and to predict possible diseases.

Effects of repeated sunbed exposures on the human skin. In vivo measurements with confocal microscopy

2004 ◽  
Vol 20 (1) ◽  
pp. 27-32 ◽  
Author(s):  
T. Gambichler ◽  
K. Sauermann ◽  
M. A. Altintas ◽  
V. Paech ◽  
A. Kreuter ◽  
...  
Keyword(s):  
Confocal Microscopy ◽  
Human Skin ◽  
In Vivo Measurements

Photoacoustic in vivo study of the penetration of sunscreen into human skin

1986 ◽  
Vol 64 (9) ◽  
pp. 1139-1141 ◽  
Author(s):  
K. Giese ◽  
A. Nicolaus ◽  
B. Sennhenn ◽  
K. Kölmel
Keyword(s):  
Human Skin ◽  
Photoacoustic Spectroscopy ◽  
In Vivo Study ◽  
Experimental Setup ◽  
In Vivo Measurements ◽  
Transfer Properties

Photoacoustic spectroscopy offers the opportunity of detecting the diffusion of light-absorbing drugs into the skin. We report on in vivo measurements on human skin treated with sunscreens. The experimental setup is described, and the transfer properties of the open-ended detector are discussed theoretically and experimentally.

Reflectance of immersed human skin: in-vivo measurements

1999 ◽  
Author(s):  
Yu. M. Proshina ◽  
Nina A. Razumikhina ◽  
Irina L. Maksimova ◽  
Valery V. Tuchin
Keyword(s):  
Human Skin ◽  
In Vivo Measurements
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